03-31-2020, 12:50 PM
Tracing through the references in the new Proxima c paper, I found what seems to be the the original paper for proxima c. Interestingly, it gives a lower mass sin i for proxima b, only 1.0 earths, which is used in the latest paper to estimate a proper mass of 2.1 earths.
Quote:If we assume the coplanarity of the orbits of the planets Proxima b and c, the de-projected mass of the close-in planet is mb = 2.1 +1.9 −0.6 M⊕ (adopting mb sin i = 1.0±0.1 M⊕ from Damasso et al. 2020).